Abstract

We report the effects of dielectricsurface properties on the device performance of organic thin film transistors (OTFTs) using polymer/high- oxide multilayered gate dielectrics. We systematically controlled the surface energy of the gate dielectric from very hydrophobic to very hydrophilic. The modified dielectricsurface strongly affected the initial growth mechanism of pentacene and subsequently the performance of the OTFTs. The performance of the OTFTs with a higher surface energy was superior to that of the OTFTs with a lower surface energy.

Received 09 June 2008Accepted 13 July 2008Published online 26 August 2008

Acknowledgments:

This work was supported by the SRC Program of MOST/KOSEF through the Center for Intelligent Nano-Bio Materials at Ewha Womans University (Grant No. R11-2005-008-00000-0), the Seoul Research and Business Development Program (Grant No. 10816), and the “SystemIC2010” Project of Korea Ministry of Knowledge Economy. Also, the authors are appreciative of the financial support from LG Display.